With his attention________on the shops along the roadside，he knocked an old man down while riding to school.

A  concentrating     B．concentrated     C．to concentrate      D．concentrates

答案　B

解析　考查词组，故选B项。

. I believe he is a great writer. I am now eagerly waiting his new novel to _______.

A. make out    B. turn out     C. come out      D. go out            

When someone is in trouble, we should ________ a friendly hand.

  A. hold on        B. hold up       C. hold out          D. hold off

After several rounds of competition, the little girl _____ because of her excellent spoken English and quick response.

A. put out          B. picked out      C. broke out         D. stood out

 ---- What should I do with this passage?

   ---- ______ the main idea of each paragraph.

A. Finding out      B. Found out        C. Find out         D. To find out